Fundamental Matrices

Metronome

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Jun 12, 2018
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Here and here the Wronskian is said to be the determinant of the fundamental matrix. However, later in the same video, an example of a fundamental matrix is given where the lower elements aren't derivatives of the higher elements, which is the point of the Wronskian. Are these two different meanings of the fundamental matrix, or is there some other reason for this discrepancy?
 
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